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Re: testing for a remote file to include file on a Windows mappeddrive
From: |
Stefan Monnier |
Subject: |
Re: testing for a remote file to include file on a Windows mappeddrive |
Date: |
Sat, 26 Jan 2008 14:24:10 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.50 (gnu/linux) |
>> (let ((file-name-handlers-alist nil)) (file-readable-p <FILE>)).
> (and (not (file-remote-p file)) (file-readable-p file))
> There could be file name handlers, which have an own implementation of
> file-readable-p for local files.
>> I think file-remote-p should really give a kind of performance and
>> reliability info: is the file available from local (i.e. fast and
>> reliable) storage, or is it only available via a network access which
>> may be slow and may fail.
> file-remote-p returns information about the *file name*, and not
> necessarily about the file: "Can the file name be used literally on the
> local host?" I believe this meaning shall be kept, for example, it is
> needed to determine whether a file name must be trimmed when used as
> argument of process-file and alike.
> The new function you are looking for is file-mounted-p or so.
I believe you're wrong and I'm right ;-)
What you consider as the meaning of `file-remote-p' is pretty close to
the info returned by (let ((file-name-handlers-alist nil)) (not
(file-readable-p <FILE>))), whereas what you want to call
`file-mounted-p' is much closer to what `file-remote-p' currently does.
E.g. (file-remote-p "/:/") will return nil, even though passing "/:/" as
an argument to a subprocess will likely fail to do what was intended.
After all, whether the filename can be passed to a subprocess has
nothing to do with whether or not it's "remote".
I suggest we clarify the meaning of file-remote-p to explain that it
returns info that relates to the time and reliability of the access to
this file. And we introduce a new one `unhandled-file-name' which
returns either "an equivalent name that can passed to subprocesses"
(e.g. for the "/:/" file-name-handler, it just strips the leading "/:"
and similarly for the "file://" one) or nil if the file cannot be
directly accessed by a subprocess (either because it's only accessible
via ssh/ftp/tar/younameit it by a file-name-handler).
Stefan
- RE: testing for a remote file to include file on a Windows mapped drive, (continued)
- RE: testing for a remote file to include file on a Windows mapped drive, Drew Adams, 2008/01/25
- RE: testing for a remote file to include file on a Windows mappeddrive, Drew Adams, 2008/01/25
- Re: testing for a remote file to include file on a Windows mappeddrive, Jason Rumney, 2008/01/25
- RE: testing for a remote file to include file on a Windows mappeddrive, Drew Adams, 2008/01/25
- Re: testing for a remote file to include file on a Windows mappeddrive, Stefan Monnier, 2008/01/25
- RE: testing for a remote file to include file on a Windows mappeddrive, Drew Adams, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Eli Zaretskii, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Michael Albinus, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Jason Rumney, 2008/01/26
- RE: testing for a remote file to include file on a Windows mappeddrive, Drew Adams, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive,
Stefan Monnier <=
- Re: testing for a remote file to include file on a Windows mappeddrive, Michael Albinus, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Eli Zaretskii, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Michael Albinus, 2008/01/27
- Re: testing for a remote file to include file on a Windows mappeddrive, Eli Zaretskii, 2008/01/27
- Re: testing for a remote file to include file on a Windows mappeddrive, Andreas Schwab, 2008/01/27
- Re: testing for a remote file to include file on a Windows mappeddrive, Michael Albinus, 2008/01/27
- RE: testing for a remote file to include file on a Windows mappeddrive, Drew Adams, 2008/01/26
- Re: testing for a remote file to include file on a Windows mappeddrive, Stefan Monnier, 2008/01/27
- Re: testing for a remote file to include file on a Windows mappeddrive, Stefan Monnier, 2008/01/27
- Re: testing for a remote file to include file on a Windows mappeddrive, Michael Albinus, 2008/01/29